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Definitions

assumption

[uh-suhmp-shuhn] / əˈsʌmp ʃən /
NOUN
taking something for granted; something expected
Synonyms
STRONGEST
acceptance belief expectation guess hunch hypothesis inference premise presumption supposition suspicion theory
STRONG
conjecture fancy posit postulate postulation presupposition shot stab supposal surmise theorization
WEAK
accepting assuming shot in the dark sneaking suspicion
Antonyms
STRONGEST
disbelief fact knowledge measurement proof reality truth
WEAK
doubt genuineness naturalness realness unexpected
NOUN
assuming possession, power
Synonyms
STRONGEST
acceptance
STRONG
acquisition adoption appropriation arrogation embracing grab seizure takeover taking undertaking usurpation
WEAK
accepting assuming shouldering taking on taking up
Antonyms
STRONG
rejection
WEAK
doubt genuineness naturalness reality realness unexpected
NOUN
arrogance
Synonyms
STRONGEST
presumption
STRONG
brass chutzpah cockiness conceit imperiousness insolence nerve pride sass self-importance
Antonyms
STRONG
humility modesty shyness timidity
WEAK
doubt genuineness naturalness reality realness unexpected

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Market reaction: Treasury yields rose after the employment report on the assumption a stronger labor market could discourage the Fed from cutting interest rates.

From MarketWatch • Apr. 3, 2026

“The assumption that the incoming ownership group can finance an additional $600 million for Moda Center — which is now a publicly-owned community asset is not possible,” lobbying materials from the Blazers stated.

From Salon • Mar. 30, 2026

"There's a sensitivity around any kind of grief and an assumption that those questions shouldn't be asked," explains the 35-year-old.

From BBC • Mar. 29, 2026

“There is this assumption that it is going to get fixed tomorrow.”

From Barron's • Mar. 28, 2026

“What is your assumption about home prices, and what is your assumption about loan losses.”

From "The Big Short" by Michael Lewis

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.